How to use FreezedUnionCase.snake for model class

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      required bool isPartOfMultiHomework,
      required DateTime dueDate,
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    const factory HomeworkDataDto.multiOneTimeHomework({
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    }) = _MultiOneTimeHomeworkDto;
  
  
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                  ...,               
                  "meterType": "km",
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                      "last_stop_dt": "2022-04-11T20:50:07.000Z",
                      "odo": 4467455.217999703,
                      "working_time": 82526342,
                      "io": {
                          "IO_239_dt": "2022-04-11T20:50:07.000Z",
                          "IO_80_dt": "2022-04-11T20:50:07.000Z",
                          "motion_dt": "2022-04-11T20:50:07.000Z",
                          "dig1_dt": "2022-04-11T20:50:07.000Z",
                          "con_dt": "2022-04-11T20:50:07.000Z",
                          "IO_24_dt": "2022-04-11T20:50:07.000Z",
                          "spd_dt": "2022-04-11T20:50:07.000Z",
                          "IO_181_dt": "2022-04-11T20:50:07.000Z",
                          "IO_16_dt": "2022-04-11T20:50:07.000Z",
                          "dls_temp1_dt": "2022-04-11T20:50:07.000Z",
                          "bat_sig_dt": "2022-04-11T20:50:07.000Z",
                          "nb_sat_dt": "2022-04-11T20:50:07.000Z",
                          "gsm_sig_dt": "2022-04-11T20:50:07.000Z",
                          "odo_dt": "2022-04-11T20:50:07.000Z",
                          "evt_id_dt": "2022-04-11T20:50:07.000Z",
                          "ang_dt": "2022-04-11T20:50:07.000Z",
                          "alt_dt": "2022-04-11T20:50:07.000Z",
                          "IO_249": 0,
                          "IO_241": 60502,
                          "IO_239": 0,
                          "IO_200": 0,
                          "IO_182": 6,
                          "IO_181": 9,
                          "IO_80": 0,
                          "IO_69": 1,
                          "IO_24": 0,
                          "IO_16": 142942199,
                          "motion": 0,
                          "ignition": 0,
                          "dls_temp1": 14.6,
                          "dls_temp1_ID": "18000803064a4310",
                          "dig4": 0,
                          "dig3": 0,
                          "dig2": 0,
                          "dig1": 0,
                          "bat_curr": 0,
                          "bat_volt": 0,
                          "bat_sig": 13757,
                          "nb_sat": 17,
                          "gsm_sig": 3, 
                           .... +200